trail - evidence pointing to a possible solution; the police are following a promising lead; the trail led straight to the perpetrator track, lead evidence, grounds - your basis for belief or disbelief; knowledge on which to base belief; the evidence that smoking causes lung cancer is very compelling
The process by which the oceanic crust is pulled under the continental crust is called subduction and the zone at which this occurs at the plate boundaries is called the subduction zone. At the subduction zone where the oceanic crust sinks beneath the continental crust a deep oceanic trench or valley is created.
Convergence due to converging plates can be either continental-oceanic convergence, oceanic-oceanic convergence or continental-continental convergence. 1  When a plate of continental crust converges with a plate of oceanic crust, the heavier oceanic crust will move under the continental crust and this process is called subduction.